SeaMonkey 2.53.10 (64-bit)

What's new in this version:

- Minor fixes for testdisplay command in ChatZilla
- Show CTCP requests (excluding ACTION and DCC)
- IRCv3: Add support for server-time
- Add localization note for network editor dialog width in ChatZilla
- IRCv3: Add support for extended-join and account-notify
- Add ability to collapse message groups in ChatZilla
- Fix JS strict warnings in unescapeTagValue in ChatZilla
- IRCv3: Add support for invite-notify
- IRCv3: Add support for batch
- Fix JS strict warning in addHistory in cZ static.js
- IRCv3: Add support for cap-notify
- Stop using canonical name as collection keys in ChatZilla
- IRCv3: Add support for TLS and STS
- Helper function for renaming irc server properties in ChatZilla
- IRCv3: Add support for MONITOR
- Remove use of msg.commasp in ChatZilla
- Allow shiftKey to modify behaviour of link clicking in cZ
- IRCv3: Add support for echo-message
- In ChatZilla make /commands return all matches starting with pattern
- Use SeaMonkey prefs to determine how links behave in cZ
- Allow parameters to be localised in ChatZilla
- Add identify command to cZ and hook into password management
- IRCv3.1: Implement SASL with PLAIN mechanism
- IRCv3: Add support for message tags
- Add last read message divider to ChatZilla
- IRCv3: Add support for account-tag
- Missing option "text encoding Unicode/UTF-8" in preferences - Mailnews
- Detect Crashreporter using AppConstants in SeaMonkey
- Link about LEGACY extensions in Add-ons Manager is broken
- Update help for clear private data preferences and dialog
- Fix typo in cs_nav_prefs_appearance
- Drop leftover "Edit Menu" comment from messageWindow.xul and addressbook.xul
- Add dummy tab routines to SeaMonkey mailnews tab browser
- Folder pane and tab/window title not updated correctly when opening in new tab
- Allow mail tab bar to be controlled separately to browser tab bar
- Copy any user set values for new mail.tabs prefs
- Merge Master Passwords and Passwords pref panes into a single pref pane
- Move warning about redirection pref from Content to Privacy & Security pane
- Move website icons prefs from content pref pane to browser pref pane
- Move browser / mailnews system integration prefs into advanced pane
- Have separate opentabfor.middleclick for mailnews
- Add removeBrowser helper for tabbrowser
- Put <browser> in a <stack> so it's easy to overlay
- Allow browser focus to be avoided
- SeaMonkey 32x32 default icon has light stripe at the bottom
- Support <input type=time> and <input type=date> in SeaMonkey
- Middleclick on browser tab handled twice (closes tab and loads URL from primary or clipboard)
- Unable to create a new "Saved Search Folder" using "Save View as a Folder..."

The following bugs were fixed in our branch of the Gecko source code only:
- Enable compression for standard http connections
- Support VS2022 for compiling under Windows

SeaMonkey 2.53.10 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
- The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
- Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
- The layout panel was added to the CSS Grid tools
- TLS 1.3 is the default SSL version now
- Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
- SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
- SeaMonkey 2.53.10 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes
- SeaMonkey 2.53.10 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
- Additional important security fixes up to Current Firefox 78.15 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.